The crash comes amid complaints from Knightsbridge residents about supercars speeding in the area.

Many of the cars are registered to Middle Eastern countries including Saudi Arabia, Kuwait and the United Arab Emirates, as well as Qatar, with their wealthy drivers bringing them to the capital to use in the summer months.

Police have set up a blue tent at the scene of the crash by police, which was still visible this morning.

The famous Wellington Arch at Hyde Park Corner (Getty)

Met Police said the dead man’s family have yet to be told.

The driver of the purple Rolls Royce stopped after the collision, according to police, and there have not been any arrests.

Detective Constable Chris May, of the Met’s Serious Collision Investigation Unit, said: “This is very busy section of road and I am sure there would be a number of people who witnessed the collision or the events leading up to it.

“I would ask those people to contact police and in particular anyone who was in the area and may have dash cam footage.

“Your information could be vital in helping us understand the cause of this tragic incident.”

Road closures at Hyde Park were put in place following the accident, causing rush-hour tailbacks.